1. L. D. Landau and E. M. Lifshitz, in Collection of Works (Nauka, Moscow, 1969), Vol. 1, p. 128.
2. N. L. Shryer and L. R. Walker, J. Appl. Phys. 45, 5406 (1974).
3. W. Döring, Z. Naturforsch. A 3, 372 (1948).
4. A. Hubert, Theorie der Domanenwände in Geordneten Medien (Springer-Verlag, Berlin, 1974; Mir, Moscow, 1977).
5. A. P. Malozemoff and J. C. Slonczewski, Magnetic Domain Walls in Bubble Materials (Academic, New York, 1979; Mir, Moscow, 1982).